In a survey conducted by a mail order company a random sample of 200 customers yielded 172
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Question:
In a survey conducted by a mail order company a random sample of 200 customers yielded 172 who indicated that they were highly satisfied with the delivery time of their orders. Calculate an approximate 95% confidence interval for the proportion of the company’s customers who are highly satisfied with delivery times.
(b) A random sample of size 49 from a normal distribution gives a 99% confidence interval for the population mean as (30, 50).
Related Book For
Statistics The Art And Science Of Learning From Data
ISBN: 9780321755940
3rd Edition
Authors: Alan Agresti, Christine A. Franklin
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